More of a stock trading "Note To Self," but ya'll are welcome to take a look. Most content is/will-be syndicated from outside sources.

How do mutual fund companies afford index funds?

If a if a mutual fund company wanted to invest in an index fund that track the S&P 500 what do they have to individually by the chairs and therefore pay a commission for every individual transaction that they incur? This might be a dumb question but I'm kind of confused about it